9 static char *write_num(char *str, uint64_t num, int base, int field_width, int precision, int flags…
10 static char *write_float_point_num(char *str, double num, int field_width, int precision, int flags…
83     int precision;   //精度  in vsprintf()  local
167         precision = -1;  in vsprintf()
173                 precision = va_arg(args, int);  in vsprintf()
178                 precision = skip_and_atoi(&fmt);  in vsprintf()
229             if (precision < 0)  in vsprintf()
232                 precision = len;  in vsprintf()
235             else if (len > precision)  in vsprintf()
237                 len = precision;  in vsprintf()
268                 str = write_num(str, va_arg(args, long long), 8, field_width, precision, flags);  in vsprintf()
270                 str = write_num(str, va_arg(args, int), 8, field_width, precision, flags);  in vsprintf()
281 …      str = write_num(str, (unsigned long)va_arg(args, void *), 16, field_width, precision, flags);  in vsprintf()
291                 str = write_num(str, va_arg(args, int64_t), 16, field_width, precision, flags);  in vsprintf()
293                 str = write_num(str, va_arg(args, int), 16, field_width, precision, flags);  in vsprintf()
302                 str = write_num(str, va_arg(args, long long), 10, field_width, precision, flags);  in vsprintf()
304                 str = write_num(str, va_arg(args, int), 10, field_width, precision, flags);  in vsprintf()
310 …         str = write_num(str, va_arg(args, unsigned long long), 10, field_width, precision, flags);  in vsprintf()
312                 str = write_num(str, va_arg(args, unsigned int), 10, field_width, precision, flags);  in vsprintf()
327             if (precision < 0)  in vsprintf()
328                 precision = 3;  in vsprintf()
330             str = write_float_point_num(str, va_arg(args, double), field_width, precision, flags);  in vsprintf()
350 static char *write_num(char *str, uint64_t num, int base, int field_width, int precision, int flags)  in write_num()  argument
422     if (js_num > precision)  in write_num()
423         precision = js_num;  in write_num()
425     field_width -= precision;  in write_num()
445     while (js_num < precision)  in write_num()
447         --precision;  in write_num()
460 static char *write_float_point_num(char *str, double num, int field_width, int precision, int flags)  in write_float_point_num()  argument
499     uint64_t num_decimal = (uint64_t)(round(1.0 * (num - num_z) * pow(10, precision))); // 获取小数部分  in write_float_point_num()
519     field_width -= (precision + 1 + js_num_z);  in write_float_point_num()
541     for (int i = 0; i < precision && js_num_d-- > 0; ++i)  in write_float_point_num()
544     while (total_dec_count < precision)  in write_float_point_num()